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A treadmill protocol to investigate independently the metabolic and mechanical stress of exercise.
Aust J Sci Med Sport. 1997 Sep; 29(3):77-82.AJ

Abstract

The purpose of this study was to describe an experimental treadmill model for the independent assessment of metabolic and mechanical stress associated with exercise. Eight well-trained male runners (VO2max 61.2 ml.kg-1.min-1) undertook, on different days, three 40 min bouts (consisting of 8 x 5 min work intervals) of treadmill running: uphill, downhill and near-level. Mean %VO2 max was 90.0, 52.7 and 52.2 for uphill, near-level and downhill running respectively. Oxygen uptake increased (p < 0.05) across the eight work intervals during uphill running, with non-significant increases in both near-level and downhill running. In contrast, heart rate increased (p < 0.05) with uphill and downhill, but not near-level running. Blood lactate concentration was higher (p < 0.01) and plasma pH lower (p < 0.01) after uphill running compared with downhill and near-level running. Plasma creatine kinase activity was elevated (p < 0.05) immediately after uphill running and 24 hours after downhill running (p < 0.05). Subjective rating of delayed onset muscle soreness was elevated (p < 0.05) at 24 and 48 hours after downhill running only. There were no significant changes in the plasma concentration of the inflammatory mediators interleukin-1beta, complement component C3a and C reactive protein. Given the observed differences in cardiorespiratory responses and indicators of muscle damage and soreness, this experimental model could be employed to investigate, independently, the metabolic and mechanical stress of exercise.

Authors+Show Affiliations

Division of Biochemistry & Molecular Biology, Australian National University, Canberra Australia.No affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Clinical Trial
Comparative Study
Controlled Clinical Trial
Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

9302491

Citation

Pyne, D B., et al. "A Treadmill Protocol to Investigate Independently the Metabolic and Mechanical Stress of Exercise." Australian Journal of Science and Medicine in Sport, vol. 29, no. 3, 1997, pp. 77-82.
Pyne DB, Baker MS, Telford RD, et al. A treadmill protocol to investigate independently the metabolic and mechanical stress of exercise. Aust J Sci Med Sport. 1997;29(3):77-82.
Pyne, D. B., Baker, M. S., Telford, R. D., & Weidermann, M. J. (1997). A treadmill protocol to investigate independently the metabolic and mechanical stress of exercise. Australian Journal of Science and Medicine in Sport, 29(3), 77-82.
Pyne DB, et al. A Treadmill Protocol to Investigate Independently the Metabolic and Mechanical Stress of Exercise. Aust J Sci Med Sport. 1997;29(3):77-82. PubMed PMID: 9302491.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - A treadmill protocol to investigate independently the metabolic and mechanical stress of exercise. AU - Pyne,D B, AU - Baker,M S, AU - Telford,R D, AU - Weidermann,M J, PY - 1997/9/26/pubmed PY - 1997/9/26/medline PY - 1997/9/26/entrez SP - 77 EP - 82 JF - Australian journal of science and medicine in sport JO - Aust J Sci Med Sport VL - 29 IS - 3 N2 - The purpose of this study was to describe an experimental treadmill model for the independent assessment of metabolic and mechanical stress associated with exercise. Eight well-trained male runners (VO2max 61.2 ml.kg-1.min-1) undertook, on different days, three 40 min bouts (consisting of 8 x 5 min work intervals) of treadmill running: uphill, downhill and near-level. Mean %VO2 max was 90.0, 52.7 and 52.2 for uphill, near-level and downhill running respectively. Oxygen uptake increased (p < 0.05) across the eight work intervals during uphill running, with non-significant increases in both near-level and downhill running. In contrast, heart rate increased (p < 0.05) with uphill and downhill, but not near-level running. Blood lactate concentration was higher (p < 0.01) and plasma pH lower (p < 0.01) after uphill running compared with downhill and near-level running. Plasma creatine kinase activity was elevated (p < 0.05) immediately after uphill running and 24 hours after downhill running (p < 0.05). Subjective rating of delayed onset muscle soreness was elevated (p < 0.05) at 24 and 48 hours after downhill running only. There were no significant changes in the plasma concentration of the inflammatory mediators interleukin-1beta, complement component C3a and C reactive protein. Given the observed differences in cardiorespiratory responses and indicators of muscle damage and soreness, this experimental model could be employed to investigate, independently, the metabolic and mechanical stress of exercise. SN - 0813-6289 UR - https://wwww.unboundmedicine.com/medline/citation/9302491/A_treadmill_protocol_to_investigate_independently_the_metabolic_and_mechanical_stress_of_exercise_ L2 - https://medlineplus.gov/exerciseandphysicalfitness.html DB - PRIME DP - Unbound Medicine ER -